Average Co-Inventor Count = 1.67
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Other (1 from 832,961 patents)
2. The Eastern Company (1 from 345 patents)
2 patents:
1. 4516281 - Sewage treatment device
2. 4409923 - Marine anchor